<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>function函数</title>
</head>

<body>
    <script>
        // 函数就是封装了一段可以被重复执行调用的代码块 ，目的：就是让大量的代码重复使用
        function getSum(num1, num2) {
            var sum = 0;
            for (var i = 0; i <= num2; i++) {
                sum += i;
            }
            console.log(sum);
        }

        getSum(1, 100);
    </script>
</body>

</html>